A brief description of self-operated heavy oil control valve

Self-operated control valve without external energy, the use of the media itself as the power source was introduced into the actuator control spool position, the pressure across the bend and flow, so that before the valve (or valve pressure) 

 Self-operated heavy oil control valve for more information

Self-operated control valve without external energy, the use of the media itself as the power of the media into the actuator control spool position, the pressure across the bend and flow, so that before the valve (or valve) pressure stability. With sensitive, good sealing, pressure set point wave power is small, widely used in gas, liquid and vapor medium decompression regulator or automatic control of pressure relief regulator.

This series of products have a single seat (ZZYP), sleeve (ZZYM), double (ZZYN), three kinds of structure; actuator has a film, piston two; role type decompression valve with pressure regulator (B type) And pressure relief valve with pressure regulator (K type). Product nominal pressure rating PN16, 40, 64; body diameter range DN20 ~ 300; leakage levels are II, IV and VI level third gear; flow characteristics for the quick opening; pressure sub-adjustment from 15 ~ 2500Kpa. Can be combined as needed to meet the needs of user conditions.

 Self-operated pressure regulating valve without external energy, can work in a non-electric gas-free place, both convenient and energy saving. 
 Pressure sub-range of small and cross each other, high precision. 
 The pressure setting can be set continuously during operation. 
 After the valve pressure regulator, the pressure before the valve and the valve pressure ratio of 10: 1 ~ 10: 8. 
 Rubber diaphragm detection, implementing agencies measured high precision, sensitive action. 
 Pressure balance mechanism, so that the control valve responsive and precise control. 
 Body: ZG230-450 ZG1Cr18Ni9Ti ZGOCr18Ni12M02Ti 
 Spool: 1Cr18Ni9Ti 0Cr18Ni12M02Ti 
 Seat: 1Cr18Ni9Ti 0Cr18Ni12M02Ti 
 Stem: 1Cr18Ni9Ti 0Cr18Ni12M02Ti 
 Membrane cover: A3 A3 steel coated with PTFE stainless steel 
 Packing: PTFE flexible graphite 
 rubber diaphragm: Ding Ng, B C, fluorine, oil-resistant rubber

Diaphragm glue area Ae (cm2)			280		400		600		1000
Signal range Pr (KPa)			20-100	20-100	20-100	20-100	20-100	20-100	20-100	20-100
Air pressure Ps (MPa)			0.14	0.14	0.14	0.14	0.14	0.14	0.14	0.14
Need to be equipped with accessories			-	P	-	P	-	P	-	P
public Said through path DN (Mm) and valve seat straight path d (Mm)	20	10	2.67	6.23
	25	12	2.22	5.19
	32	15			2.58	6.02
	40	20			3.18	6.40
		25			2.58	6.02
					2.12	4.95
	50	25			2.58	6.02
		32			2.12	4.95
		40			1.73	4.05
	65	32					2.04	4.77
	80	40					2.60	6.08
		50					2.05	4.77
		65					1.68	3.93
	100	50					2.05	4.77
		65					1.69	3.39
		70					1.36	3.18
	125	65							1.83	4.28
	150	70							2.27	5.30
		100							1.84	4.28
		125							1.54	3.59
	200	100							1.84	4.28
		125							1.54	3.59
		150							1.12	2.62

 

* P: valve positioner

** For ZXPV single-seat bellows seal control valve, the maximum allowable pressure difference of 1.0MPa, the data in the table if the value is less than 1.0MPa then unchanged, if the value of MPa, the value of 1.0MPa.

Various inherent flow characteristics and relative flow rates at different relative distances: R50

Characteristics / Q / Qmax / i / l%	0	10	20	30	40	50	60	70	80	90	100
straight line	2	11.8	21.6	31.4	41.2	51	60.8	70.6	80.4	90.2	100
Equal ratio	2	3	4.37	6.5	9.6	14.1	20.9	30.9	45.7	67.6	100
Go ahead	2	31.6	44.8	54.8	63.2	70.7	77.5	83.6	89.4	94.8	100
parabola	2	5	9.8	15.9	23.5	32.6	43.1	55.1	68.6	83.5	100

Nominal diameter DN			20	25	32	40	50	65	80	100	125	150	200	250	300
Flange take over size B			383		512		603	862		1023	1380		1800	2000	2200
Flange face distance L			150	160	180	200	230	290	310	350	400	480	600	730	850
Pressure adjustment range kpa	15-140	H	475		520		540	710		780	840	880	915	940	1000
		A	280		308
	280-500	H	455		500		520	690		760	800	870	880	900	950
		A	230
	120-300	H	450		490		510	680		750	790	860	870	890	940
		A	176					194			280
	480-1000	H	445		480			670		740	780	850	860	880	930
		A	176					194			280
	600-1500	H	445		570		600	820		890	950		1000	1100	1200
		A	85		96
	1000-2500	H	445		570		600	820		890	950	1000	1100	1200
		A	85		96
Weight kg			26		37		42	72	90	114	130	144	180	200	250
Pressure pipe connector tired grain			M16 × 1.5

Flange standard: Cast iron flange Press JB78-59 
 steel flange according to GB9113-88 JB / T79.1-94 
 Flange sealing surface type: PN10, PN16 is convex; PN40, PN64 is convex surface, the valve body is concave. 
 According to the standard length of the structure GB12221-89 
 diaphragm actuator air signal interface: internal thread M16 × 1.5 
 jacket insulation jacket type heating medium interfaces: welding. 4 × φ18 
 
 * body flange and the flange end surface distance may be specified by the user manufacturing standards such as:. ANSI, JIS, JPI standards. 
 The main parts of the material 
 body, valve cover: HT200, ZG230-450, ZG1Cr18Ni9Ti 
 valve, valve seat: 1Cr18Ni9Ti, Stellite overlay 
 soft seal spool: reinforced polyethylene tetrafluoroethylene 
 filler: PTFE, flexible graphite 
 bellows: 1Cr18Ni9Ti 
 shim: rubber asbestos, 10 #, 1Cr18Ni9Ti asbestos spiral wound gasket 
 film cap: A3 
 corrugated diaphragm: NBR enhancement polyester fiber fabric 
 spring: 60SiMn 
 valve Rod, push rod 
 : 2Cr13 , 1Cr18Ni9Ti Bushing: 2Cr13